Jer 52:1

בֶּן־עֶשְׂרִ֨ים וְאַחַ֤ת שָׁנָה֙ צִדְקִיָּ֣הוּ בְמָלְכ֔וֹ וְאַחַ֤ת עֶשְׂרֵה֙ שָׁנָ֔ה מָלַ֖ךְ בִּירֽוּשָׁלִָ֑ם וְשֵׁ֣ם אִמּ֔וֹ חמיטל חֲמוּטַ֥ל בַּֽת־יִרְמְיָ֖הוּ מִלִּבְנָֽה׃

Zedekiah was twenty-one years old when he became king, and he reigned in Jerusalem eleven years. His mother’s name was Hamutal daughter of Jeremiah; she was from Libnah.